/*

    Copyright David Abrahams 2003-2004
    Copyright Aleksey Gurtovoy 2003-2004

    Distributed under the Boost Software License, Version 1.0. 
    (See accompanying file LICENSE_1_0.txt or copy at 
    http://www.boost.org/LICENSE_1_0.txt)
            
    This file was automatically extracted from the source of 
    "C++ Template Metaprogramming", by David Abrahams and 
    Aleksey Gurtovoy.

    It was built successfully with GCC 3.4.2 on Windows using
    the following command: 

        g++ -I..\..\boost_1_32_0 -c -o%TEMP%\metaprogram-chapter8-example14.o example14.cpp
        

*/
#include <boost/mpl/equal.hpp>

#include <boost/mpl/placeholders.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/static_assert.hpp>
namespace mpl = boost::mpl;
using namespace mpl::placeholders;



    template <class T, class Dimensions>
    struct quantity
    {

template <class OtherDimensions>
quantity(quantity<T,OtherDimensions> const& rhs)
  : m_value(rhs.value())
{
    BOOST_MPL_ASSERT((mpl::equal<Dimensions,OtherDimensions>));
}

        T value() const { return m_value; }
     private:
        T m_value;
    };
    

